Electronic control system for a weighing scale
US4549620A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1983 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Aug 22, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S177/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A weighing system is disclosed which operates in conjunction with a scale that has a trigger mechanism for terminating the flow of material into the scale's bucket. This system automatically periodically revises a tare signal stored in a latch circuit for combination with a weight signal to produce a net weight signal. The tare signal provides a measure of the residue stuck in the scale bucket. In an additional embodiment of the invention, a programmable controller is used as the means for periodically resetting the tare signal and is used to evaluate the final weight data to determine the average weight and the standard deviation of the weights. These determinations are used by the controller in combination with a predetermined weight to arrive at a computer setpoint signal for adjustment of the triggering of the flow termination so that the final weights will most closely approximate the predetermined weight. Further disclosed is a volume sensor for detecting whether the weighed material fills at least a minimum volume.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.